68109402740 has 48 divisors (see below), whose sum is σ = 149413178880. Its totient is φ = 26030484480.

The previous prime is 68109402737. The next prime is 68109402749. The reversal of 68109402740 is 4720490186.

It is a super-3 number, since 3×68109402740³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68109402749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337796 + ... + 500324.

It is an arithmetic number, because the mean of its divisors is an integer number (3112774560).

Almost surely, 2^68109402740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68109402740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74706589440).

68109402740 is an abundant number, since it is smaller than the sum of its proper divisors (81303776140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68109402740 is a wasteful number, since it uses less digits than its factorization.

68109402740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163472 (or 163470 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 68109402740 in words is "sixty-eight billion, one hundred nine million, four hundred two thousand, seven hundred forty".